Vulcanizable Adhesive Composition

Abstract

A vulcanizable adhesive composition, which comprises 45-75% by weight of phenol resin, preferably a mixture of novolak-type and resol-type phenol resins, 5-25% by weight of halogenated polymer, and 10-30% by weight of a metal oxide, can improve an interlayer adhesiveness between the acrylic rubber and metal without surface treatment of metal, such as a chemical treatment, e.g. zinc phosphate treatment, etc., blast treatment, or primer treatment, and thus can be effectively used in the production of a metal/adhesive layer/acrylic rubber composite.

1 . A vulcanizable adhesive composition, which comprises 45-75% by weight of phenol resin, 5-25% by weight of polymers of dichlorobutadiene, polymers of brominated dichlorobutadiene, chlorinated polychloroprene or chlorinated rubber, and 10-30% by weight of a metal oxide, on the basis of total solid matters. 
     
     
         2 . A vulcanizable adhesive composition according to  claim 1 , wherein the phenol resin is a novolak-type phenol resin, a resol-type phenol resin or a mixture thereof. 
     
     
         3 . A vulcanizable adhesive composition according to  claim 2 , wherein the phenol is a mixture comprising 50-90% by weight of novolak-type phenol resin and 50-10% by weight of resol-type phenol resin. 
     
     
         4 . (canceled) 
     
     
         5 . A vulcanizable adhesive composition according to  claim 1 , wherein the metal oxide is a titanium oxide, a divalent metal oxide, or a mixture of a titanium oxide and a divalent metal oxide. 
     
     
         6 . A vulcanizable adhesive composition according to  claim 1 , for use as an adhesive in the production of a metal/adhesive layer/acrylic rubber composite. 
     
     
         7 . An acrylic rubber-metal composite which comprises a metal and acrylic rubber, as laminated with a vulcanizable adhesive composition according to  claim 1 . 
     
     
         8 . An acrylic rubber-metal composite according to  claim 7 , wherein the metal is a surface-untreated metal.